Jacqy,
I still think you are getting the errors because of what I told you, there were Windows Services added that are pointing to inexistent INI files, and I am referring to the my.ini file that normally the MySQL Installer creates for every MySQL Server installation.

You can take a look to the MySQL Server services properties and verify what I am telling you. Indeed this is caused by a failed installation.

Are you able to run the MySQL Server through its service? I think the MySQL service does not start either because it will not find the config file.

If what I am saying is right then the way to get rid of the Notifier error would be to get rid of the service that is failing to start, if you delete the service the error should go away. To delete it you can do something like:

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